I believe the correct answer is to help the reader visualize a view where water and sky are difficult to tell apart.
The author is trying to portray an image where the water and the sky are somehow blending into each other - you can't tell where one ends and the other one begins, because both items are colored similarly - various shades of blue.
Answer:
okay so I think the best answer choice would be "Many new bicycles have begun to appear in stores, and we'll show you the best ones."
It makes sense because the article is supposed to be about COMPARING bicycles and this is the only one that really implies that there will be a comparison of diff bicycles. hope this helps.
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